IMHO, in a client server scenario, you should expose business APIs not the entire DAL. That's what the server is for. Otherwise you would have used the DAL at the client and bridged the server.
You can find a WCF example in the download section of our web site, which give you an example how to create a WCF client to transfer LLBLGen objects over the wire.
But you will create the service methods and define what you need to send and when.
Also if you are interested in .NET RIA services, you may need to look at this thread (4 pages):
http://www.llblgen.com/tinyforum/Messages.aspx?ThreadID=16377
LLBLGen's support for .NET RIA services is released (beta), a coupleof weeks and the release should be out there, with v.3.1.